Bt-transgenic oilseed rape hybridization with its weedy relative, Brassica rapa Matthew D. Halfhill, Reginald J. Millwood, Paul L. Raymer and C. Neal Stewart Jr. Environ. Biosafety Res., 1 1 (2002) 19-28 Published online: 15 October 2002 DOI: 10.1051/ebr:2002002